In a recent trial at this Station, solvent extracted soybean
solvent cottonseed meal, and a mixture of the two, with or without
gave satisfactory results as protein supplements for weanling pigs
pasturel. There was little difference in results from the two oil
Adding an aureomycin supplement increased pig gains slightly.

oil meal,
aureomycin,
on oats
meals.

PROCEDURE

In the trial reported herein, the experiment mentioned above was repeated
with pigs on millet pasture instead of oats.

Duroc sows producing the experimental pigs were fed a ration of corn,
soybean oil meal, and minerals on pasture.

The pigs were allotted as equally as possible approximately one
weaning. The following rations were fed:

The mineral mixture consisted of two parts ground limestone, two parts
steamed bonemeal, and one part salt. To insure adequate calcium consumption,
steamed bonemeal was also included in the protein supplement as previously
described.

Millet pastures were grazed.

RESULTS

Table 1-635 gives the results of the feeding trial.

All lots of pigs made excellent gains and there was a difference of only
$0.77 in feed cost per 100 pounds gain between the group making the most expensive
(Lot VI) and the one making the least expensive gain (Lot V). As in the preceding
trial2, solvent process soybean oil meal, solvent cottonseed meal, or a mixture of
the two, with or without aureomycin, appeared to be a satisfactory protein supple-
ment for thrifty weanling pigs on good pasture.

Solvent Process Soybean versus Cottonseed Meal.- Table 2-635 contains a
comparison of the two oil meals and a mixture of the two. The data given in this
table were obtained by combining the data for Lots I and II, for Lots III and IV,
and for Lots V and VI (i.e., combining the results from the oil meal with that
from oil meal plus antibiotic).

Pigs fed soybean oil meal gained slightly faster than those fed cottonseed
meal but the latter made a little cheaper gain because cottonseed meal cost $15
per ton less than soybean meal. The mixture of the two meals gave about the same
gain at a slightly lower cost per 100 pounds gain than the soybean oil meal.

Aureomycin versus No Aureomycin.- As shown in Table 3-635, there was not a
great difference in the average gains made by pigs receiving aureomycin (Lots II,
IV, & VI) and those not fed aureomycin (Lots I, III, & V). It should be noted
that large, thrifty pigs were used, and excellent pasture was provided.

SUMMARY

Solvent extracted soybean oil meal, solvent cottonseed meal, or a mixture
of the two, with or without aureomycin, gave satisfactory results as a protein

2See Footnote, page 1.

supplement for large, thrifty pigs grazing excellent pasture.

Solvent soybean meal gave slightly more gain at a little higher cost than
solvent cottonseed meal.

Adding an aureomycin supplement did not result in greatly increased gains
of large, thrifty pigs on excellent pasture.

ACKNOWLEDGEMENT

Fine Chemical Division, American Cyanamid Company, New York, N.Y. and
Dothan Oil Mill, Dothan, Alabama contributed to the support of this experiment.

FSB
250 copies

Results Fattening Trial with Various Protein Supplements for Pigs on Pasture.